Any one know the answers this has to be turned in tomorrow

Worth 30 points! in this diagram, both polygons are regular. what is the value, in degrees, of the sum of the measures of angles abc and abd?

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.

Sun country bus lines has 80000 shares of stock outstanding what would the dividend per share of stock be from a dividends declaration of 109600